Cylinder-boring machine.



No. 810,114.. A PATENTED JAN. 16, 1906.-

' J. H. GOULDSBERRY.

CYLINDER BORING MACHINE.

APPLICATION FILEDIBBJ, 1905. l p

2 SHEETS-SHEET 1.

PATENTED JAN. 16, 1906.

J. H. GOULDSBERRY.

GYLINDBR BORING MACHINE.

APPLICATION FILED FEB. 15. 1905.

2 SHEETS-SHEET 2.

Wit-,momo

UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

Patented Jan. 16, 1906.

Application led February 15, 1905. Serial NO- 2451741- To all whom, t Wwf/y concern:

Be it known that I, JOSEPH H. GoULDs- BERRY, a citizen of the United States, residing at Teutonia, in the county of Marshall and State of West Virginia, have invented certain new and useful Improvements in Cylinder-Boring Machines, of which the following is a specification.

The primary intention of this invention is the provision of a mechanism designed most especially for boring or truing engine-cylinders, although it may be used with equal advantage for boring ordnance and articles of kindred nature usually requiring heavy and specially-constructed lathes.

rlhe present invention relates more particularly to the mountings, whereby the mechanism may be attached to the cylinder or article to be bored, to the drive mechanism for operating 'the boring-tool, and to the feed mechanism, whereby the boring-tool is advanced in the operation of the machine.

For a full description of the invention and the merits thereof and also to acquire a knowledge of the details of construction of the means for effecting the result reference is to be had to the following description and accompanying drawings.

While the invention may be adapted to different formsand conditions by changes in the structure and minor details without departin from the spirit or essential features thereof, still'the preferred embodiment thereof is shown in the accompanying drawings, in which- Figure 1 is a top plan view of a boring mechanism embodying the invention, the cylinder being in section. Fig. 2 is a section on the line fc x of Fig. 1 looking in the direction of the arrows, showing the band pulley and crank in full. Fig. 3 is a section on the line :1c of Fig. 1 .looking in the opposite direction, the full lines showing the feed-trains in gear and the dotted lines showing said feed-trains out of gear. Fig. 4 is a transverse section on the line y y of Fig. 1 looking in the direction of the arrows, the dotted lines showing a hinged section moved so as to release the feed-screw cooperating therewith. Fig. 5 is a sectional view of the cutter-head and adjunctive parts on a larger scale. Fig. 6 is a detail view of a spider for supporting the outer end of the boring-bar when the cylinder is disconnected from its bed or supportingframework.

Corresponding and like parts are referred to in the followino` description and indicated in all the views of the drawings by the same reference characters.

The cylinder or like part to be bored or trued is represented at 1., and 2 indicates the supporting bed or framework therefor. Usually an end of the borin -bar 3 is supported in the gland 4 of the stu ng-boX located upon the part forming the closure for the end of the cylinder connected to the bed or framework 2. When the cylinder or like part is disconnected from its framework and is open at both ends, a spider 5, such as shown in Fig. 6, is employed for supporting the end of the boring-bar 3 opposite to that acted upon by the feed and drive mechanisms. The spider 5 is similar in connection to the spider 6, as shown in Fig. 1, and is provided with setscrews 7a, threaded in oifstanding parts of the arms and adapted to center the spider and connect it to the end of the cylinder or like part 1, as will be readily comprehended.

The operating mechanism isapplied to a suitable framework which is attached in any convenient and suitable manner to the spider 6 and which, as shown, comprises similar members 7, having a parallel disposition and spaced apart a distance to receive the workin elements. The boring bar 3 passes loosely through the spider 6, members 7, and intermediate connection 8 and has a featherand-spline connection with a spur-gear 9, mounted in any suitable way in the members 7 and formed with or having connected thereto a pinion 10 for rotation therewith. Standards 11 are projected from the end portions of the member 7 adjacent to the spider and are provided at their upper ends with bearings in which a transverse shaft 12 is mounted, said shaft being adapted to be driven by any suitable source of power and, as shown, is provided at one end with a crank 13 and at the opposite end with a band-pulley 14. A worm-gear 15, fast upon the shaft 12, is in mesh with the spur-gear 9, so as to impart motion thereto when the shaft, 12 is in operation.

A cross-head 16 is connected to the outer end of the boring-bar, which latter is journaled therein, said cross-head being confined between a set-collar 17, secured to a reduced part of the boring-bar and the shoulder formed at the base of said reduced part. Guide-rods 18 project from the framework 7, passing loosely through openings in the end portion of the cross-head, and give proper di- IOO IIO

fast with the cross-head and the opposite section fas-t with a pivoted part 22, hingedly or loosely connected at one end to the crosshead and provided at the opposite end with a suitable clamp or fastening 23. When the pivoted sections 22 are released and thrown out of the way, the cross-head 16 may be moved quickly in or out, thereby providing for rapid adjustment of the boring-bar and cutting-tool carried thereby. When the sections 22 are closed upon the cross-head and` secured by the fastenings 23 and the feedscrews 20 are set in motion, the boring-bar isl slowly moved in the direction of its len th, so

as to properly advance the cutting-too to its` Work.

A gear-train 24 cooperates with each feedscrew and is carried by a suitable frame 25, mounted to turn upon the respective feedscrew or in line therewith, so as to remain in mesh at all times with the coperating gearwheel 21. The swinging end of the pivoted frame 25 is curved, as shown at 26, and provided with a slot 27, which receives a fastening 28, by means of which the swinging end of said pivoted frame is held to the framework 7 in the desired position. The gearwheel 29, remote from the gear-wheel 21, is adapted to be thrown into and out of engagement with the pinion or gear element 10, as shown most clearly by the full and dotted lines in Fig. 3. When the gear elements 29 and 10 are in meshing relation and the shaftl 12 is rotated, the boring-bar 3 receives a simultaneous rotary and longitudinal movement, whereby the boring or cutting tool is operated and advanced to its work.

The boring or cutting tool comprises a head 30, which is adapted to be secured to the boring-bar 3 by means of a set-screw 31. A bit 32 is adjustably connected with the head 30 by means of a bolt or suitable fastening 33 and is adjustable by means of a setscrew 34, threaded into the head 30 and adapted to engage` at its outer end with a shoulder or stop 35 near the outer end of the bit. The provision of the set-screw 34 enables adjustment of the bit to a nicety and in a positive manner'.

When it is required either to bore or true a cylinder, the boring-bar 3 is mounted in the gland at one end of said cylinder and the spider 6 is fitted to the opposite end of said cylinder in the manner set forth. Upon rotating the shaft 12, either by hand or power, the boring-bar receives a rotary movement and is simultaneously moved inward by the action of the feed-screws 20, thereby advancing the boring or cutting tool simultaneously with its rotation. Obviously the mechanism is well adapted for boring ordnance or similar articles generally requiring heavy lathes and special machinery. When not required for immediate use, the mechanism may be laid aside, so as not to occupy valuable space or be in the way.

I-Iaving thus described the invention, what is claimed as new is- 1. In combination, a boring-bar, a head adjustable thereon and provided in one side with a recess and in an edge with a threaded opening, means for securing the head to the boring-bar in an adjusted position, a bit seated in the recess of said head and adjustable therein and provided with an offset or shoulder, a set-screw threaded into the opening extended inward from the edge of the head and adapted to engage with said oset of the bit, and means vfor securing the bit to the head in an adjusted position.

2. In a tool of the character described, the combination of a framework, guide-rods supported thereby and extended therefrom, feed-screws mounted in said framework, a cross-head slidable upon said guide-rods and comprising movable portions between which said guide-rods and feed-screws are received, feed-nuts cooperating with the feed-screws and confined between the parts of the crosshead, fastening means for securing the parts of the cross-head when closed upon the guiderods and feed-nuts, a bar rotatably mounted in the framework and cross-head andmovable with the latter and slidable in said framework and provided with cutting mechanism, and operating-gearing between said rotatable bar and feed-screws and supported by the said framework.

3. In a machine of the character set forth, a framework comprising' spaced members, guide-rods connecting said members and eX- tended therefrom, feed-screws mounted in the framework, a cross-head slidable upon said guide-rods, a bar provided with cutting mechanism and mounted in said cross-head to move therewith and having both rotary and sliding movement in the framework, a driver mounted upon said bar and having a sliding -key connection therewith, pivoted frames mounted coaXially with the feedscrews, and a train of gearing mounted upon each of the pivoted frames and having connection with the respective feed-screws and adapted to be thrown into and out of gear with the aforesaid driver, the pivoted frames, trains of gearing and driver being arranged between the spaced members of the aforementioned framework.

L1. A machine of the character described comprising a spider, clamp-screws fitted in the arms of said spider, a framework com- IOO `prising spaced members, connecting means etween said framework and spider, guiderods connecting the spaced members of the framework and extended therefrom, feedscrews mounted in the framework, a crosshead having movable parts between which are received said guide-rods and feed-screws, feed-nuts confined between the movable parts of the cross-head and receiving the feedscrews, fastening means for securing the movable parts of the cross-head when closed upon the guide-rods and feed-nuts, a boring-bar rovlded with cutting mechanism mounted m the cross-head and framework and having both rotary and sliding movement with reference to said framework and movable with the cross-head, a driver mounted upon the boring-bar to turn therewith but admitting of said bar having sliding movement therethrough,- frames pivoted coaxially with the feed-screws, and trains of gearing supported by said pivoted frames and connected with the respective feed-screws and adapted to be JOSEPH I-I. GOULSBERRY. [L s] Witnesses:

JOHN H. MoIsAAo, AWM. S. MoCUToHEoN. 

